The capital 'R' that has two vertical lines instead of one like the alphabet letter stands for "all real numbers". If it is a lower case 'r' it would probably be a variable.
You use variables to stand for numbers in algebra
r is a letter used to show the lenth, height, angle degree or point ect so it doesn't really stand for anythin ex a 5 by r rectangle r = the lenght and could tequniqally be any #
Algebra is not affected by language. It is almost always done in writing.
Algebra is a branch of mathematics and not a spoken language.
arabic
Rated R for strong language, some disturbing content and brief violence
Arabic
It is algebra.
5 Gold Rings
R=Role A=Audience F=Format T=Topic
The etymology behind the algebra is a cognate from Arabic language. The word transliterated from its Arabic origin would be "al-jabr."
Arabic